2 * Server-side procedures for NFSv4.
4 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35 #include <linux/fs_struct.h>
36 #include <linux/file.h>
37 #include <linux/falloc.h>
38 #include <linux/slab.h>
44 #include "current_stateid.h"
50 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
51 #include <linux/security.h>
54 nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
56 struct inode *inode = d_inode(resfh->fh_dentry);
60 status = security_inode_setsecctx(resfh->fh_dentry,
61 label->data, label->len);
66 * XXX: We should really fail the whole open, but we may
67 * already have created a new file, so it may be too
68 * late. For now this seems the least of evils:
70 bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
76 nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
80 #define NFSDDBG_FACILITY NFSDDBG_PROC
82 static u32 nfsd_attrmask[] = {
83 NFSD_WRITEABLE_ATTRS_WORD0,
84 NFSD_WRITEABLE_ATTRS_WORD1,
85 NFSD_WRITEABLE_ATTRS_WORD2
88 static u32 nfsd41_ex_attrmask[] = {
89 NFSD_SUPPATTR_EXCLCREAT_WORD0,
90 NFSD_SUPPATTR_EXCLCREAT_WORD1,
91 NFSD_SUPPATTR_EXCLCREAT_WORD2
95 check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
96 u32 *bmval, u32 *writable)
98 struct dentry *dentry = cstate->current_fh.fh_dentry;
99 struct svc_export *exp = cstate->current_fh.fh_export;
101 if (!nfsd_attrs_supported(cstate->minorversion, bmval))
102 return nfserr_attrnotsupp;
103 if ((bmval[0] & FATTR4_WORD0_ACL) && !IS_POSIXACL(d_inode(dentry)))
104 return nfserr_attrnotsupp;
105 if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) &&
106 !(exp->ex_flags & NFSEXP_SECURITY_LABEL))
107 return nfserr_attrnotsupp;
108 if (writable && !bmval_is_subset(bmval, writable))
110 if (writable && (bmval[2] & FATTR4_WORD2_MODE_UMASK) &&
111 (bmval[1] & FATTR4_WORD1_MODE))
117 nfsd4_check_open_attributes(struct svc_rqst *rqstp,
118 struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
120 __be32 status = nfs_ok;
122 if (open->op_create == NFS4_OPEN_CREATE) {
123 if (open->op_createmode == NFS4_CREATE_UNCHECKED
124 || open->op_createmode == NFS4_CREATE_GUARDED)
125 status = check_attr_support(rqstp, cstate,
126 open->op_bmval, nfsd_attrmask);
127 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
128 status = check_attr_support(rqstp, cstate,
129 open->op_bmval, nfsd41_ex_attrmask);
136 is_create_with_attrs(struct nfsd4_open *open)
138 return open->op_create == NFS4_OPEN_CREATE
139 && (open->op_createmode == NFS4_CREATE_UNCHECKED
140 || open->op_createmode == NFS4_CREATE_GUARDED
141 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
145 * if error occurs when setting the acl, just clear the acl bit
146 * in the returned attr bitmap.
149 do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
150 struct nfs4_acl *acl, u32 *bmval)
154 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
157 * We should probably fail the whole open at this point,
158 * but we've already created the file, so it's too late;
159 * So this seems the least of evils:
161 bmval[0] &= ~FATTR4_WORD0_ACL;
165 fh_dup2(struct svc_fh *dst, struct svc_fh *src)
168 dget(src->fh_dentry);
170 exp_get(src->fh_export);
175 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
179 if (open->op_truncate &&
180 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
183 accmode |= NFSD_MAY_READ_IF_EXEC;
185 if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
186 accmode |= NFSD_MAY_READ;
187 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
188 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
189 if (open->op_share_deny & NFS4_SHARE_DENY_READ)
190 accmode |= NFSD_MAY_WRITE;
192 status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
197 static __be32 nfsd_check_obj_isreg(struct svc_fh *fh)
199 umode_t mode = d_inode(fh->fh_dentry)->i_mode;
206 * Using err_symlink as our catch-all case may look odd; but
207 * there's no other obvious error for this case in 4.0, and we
208 * happen to know that it will cause the linux v4 client to do
209 * the right thing on attempts to open something other than a
212 return nfserr_symlink;
215 static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh *resfh)
217 if (nfsd4_has_session(cstate))
219 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
224 do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh **resfh)
226 struct svc_fh *current_fh = &cstate->current_fh;
230 *resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
232 return nfserr_jukebox;
233 fh_init(*resfh, NFS4_FHSIZE);
234 open->op_truncate = 0;
236 if (open->op_create) {
237 /* FIXME: check session persistence and pnfs flags.
238 * The nfsv4.1 spec requires the following semantics:
240 * Persistent | pNFS | Server REQUIRED | Client Allowed
241 * Reply Cache | server | |
242 * -------------+--------+-----------------+--------------------
243 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1
245 * | | and EXCLUSIVE4 | or EXCLUSIVE4
247 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1
248 * yes | no | GUARDED4 | GUARDED4
249 * yes | yes | GUARDED4 | GUARDED4
253 * Note: create modes (UNCHECKED,GUARDED...) are the same
254 * in NFSv4 as in v3 except EXCLUSIVE4_1.
256 current->fs->umask = open->op_umask;
257 status = do_nfsd_create(rqstp, current_fh, open->op_fname.data,
258 open->op_fname.len, &open->op_iattr,
259 *resfh, open->op_createmode,
260 (u32 *)open->op_verf.data,
261 &open->op_truncate, &open->op_created);
262 current->fs->umask = 0;
264 if (!status && open->op_label.len)
265 nfsd4_security_inode_setsecctx(*resfh, &open->op_label, open->op_bmval);
268 * Following rfc 3530 14.2.16, and rfc 5661 18.16.4
269 * use the returned bitmask to indicate which attributes
270 * we used to store the verifier:
272 if (nfsd_create_is_exclusive(open->op_createmode) && status == 0)
273 open->op_bmval[1] |= (FATTR4_WORD1_TIME_ACCESS |
274 FATTR4_WORD1_TIME_MODIFY);
277 * Note this may exit with the parent still locked.
278 * We will hold the lock until nfsd4_open's final
279 * lookup, to prevent renames or unlinks until we've had
280 * a chance to an acquire a delegation if appropriate.
282 status = nfsd_lookup(rqstp, current_fh,
283 open->op_fname.data, open->op_fname.len, *resfh);
286 status = nfsd_check_obj_isreg(*resfh);
290 if (is_create_with_attrs(open) && open->op_acl != NULL)
291 do_set_nfs4_acl(rqstp, *resfh, open->op_acl, open->op_bmval);
293 nfsd4_set_open_owner_reply_cache(cstate, open, *resfh);
294 accmode = NFSD_MAY_NOP;
295 if (open->op_created ||
296 open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR)
297 accmode |= NFSD_MAY_OWNER_OVERRIDE;
298 status = do_open_permission(rqstp, *resfh, open, accmode);
299 set_change_info(&open->op_cinfo, current_fh);
305 do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
307 struct svc_fh *current_fh = &cstate->current_fh;
311 /* We don't know the target directory, and therefore can not
312 * set the change info
315 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
317 nfsd4_set_open_owner_reply_cache(cstate, open, current_fh);
319 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
320 (open->op_iattr.ia_size == 0);
322 * In the delegation case, the client is telling us about an
323 * open that it *already* performed locally, some time ago. We
324 * should let it succeed now if possible.
326 * In the case of a CLAIM_FH open, on the other hand, the client
327 * may be counting on us to enforce permissions (the Linux 4.1
328 * client uses this for normal opens, for example).
330 if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH)
331 accmode = NFSD_MAY_OWNER_OVERRIDE;
333 status = do_open_permission(rqstp, current_fh, open, accmode);
339 copy_clientid(clientid_t *clid, struct nfsd4_session *session)
341 struct nfsd4_sessionid *sid =
342 (struct nfsd4_sessionid *)session->se_sessionid.data;
344 clid->cl_boot = sid->clientid.cl_boot;
345 clid->cl_id = sid->clientid.cl_id;
349 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
352 struct nfsd4_open *open = &u->open;
354 struct svc_fh *resfh = NULL;
355 struct net *net = SVC_NET(rqstp);
356 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
357 bool reclaim = false;
359 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
360 (int)open->op_fname.len, open->op_fname.data,
363 /* This check required by spec. */
364 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
367 open->op_created = 0;
370 * Before RECLAIM_COMPLETE done, server should deny new lock
372 if (nfsd4_has_session(cstate) &&
373 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE,
374 &cstate->session->se_client->cl_flags) &&
375 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
378 if (nfsd4_has_session(cstate))
379 copy_clientid(&open->op_clientid, cstate->session);
381 /* check seqid for replay. set nfs4_owner */
382 status = nfsd4_process_open1(cstate, open, nn);
383 if (status == nfserr_replay_me) {
384 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay;
385 fh_put(&cstate->current_fh);
386 fh_copy_shallow(&cstate->current_fh.fh_handle,
388 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
390 dprintk("nfsd4_open: replay failed"
391 " restoring previous filehandle\n");
393 status = nfserr_replay_me;
397 if (open->op_xdr_error) {
398 status = open->op_xdr_error;
402 status = nfsd4_check_open_attributes(rqstp, cstate, open);
406 /* Openowner is now set, so sequence id will get bumped. Now we need
407 * these checks before we do any creates: */
408 status = nfserr_grace;
409 if (opens_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
411 status = nfserr_no_grace;
412 if (!opens_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
415 switch (open->op_claim_type) {
416 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
417 case NFS4_OPEN_CLAIM_NULL:
418 status = do_open_lookup(rqstp, cstate, open, &resfh);
422 case NFS4_OPEN_CLAIM_PREVIOUS:
423 status = nfs4_check_open_reclaim(&open->op_clientid,
427 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
429 case NFS4_OPEN_CLAIM_FH:
430 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
431 status = do_open_fhandle(rqstp, cstate, open);
434 resfh = &cstate->current_fh;
436 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
437 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
438 dprintk("NFSD: unsupported OPEN claim type %d\n",
439 open->op_claim_type);
440 status = nfserr_notsupp;
443 dprintk("NFSD: Invalid OPEN claim type %d\n",
444 open->op_claim_type);
445 status = nfserr_inval;
449 * nfsd4_process_open2() does the actual opening of the file. If
450 * successful, it (1) truncates the file if open->op_truncate was
451 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
453 status = nfsd4_process_open2(rqstp, resfh, open);
454 WARN(status && open->op_created,
455 "nfsd4_process_open2 failed to open newly-created file! status=%u\n",
456 be32_to_cpu(status));
457 if (reclaim && !status)
458 nn->somebody_reclaimed = true;
460 if (resfh && resfh != &cstate->current_fh) {
461 fh_dup2(&cstate->current_fh, resfh);
465 nfsd4_cleanup_open_state(cstate, open);
466 nfsd4_bump_seqid(cstate, status);
471 * OPEN is the only seqid-mutating operation whose decoding can fail
472 * with a seqid-mutating error (specifically, decoding of user names in
473 * the attributes). Therefore we have to do some processing to look up
474 * the stateowner so that we can bump the seqid.
476 static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op)
478 struct nfsd4_open *open = &op->u.open;
480 if (!seqid_mutating_err(ntohl(op->status)))
482 if (nfsd4_has_session(cstate))
484 open->op_xdr_error = op->status;
485 return nfsd4_open(rqstp, cstate, &op->u);
489 * filehandle-manipulating ops.
492 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
495 u->getfh = &cstate->current_fh;
500 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
503 struct nfsd4_putfh *putfh = &u->putfh;
505 fh_put(&cstate->current_fh);
506 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
507 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
509 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
513 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
518 fh_put(&cstate->current_fh);
519 status = exp_pseudoroot(rqstp, &cstate->current_fh);
524 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
527 if (!cstate->save_fh.fh_dentry)
528 return nfserr_restorefh;
530 fh_dup2(&cstate->current_fh, &cstate->save_fh);
531 if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) {
532 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t));
533 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
539 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
542 fh_dup2(&cstate->save_fh, &cstate->current_fh);
543 if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG)) {
544 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t));
545 SET_STATE_ID(cstate, SAVED_STATE_ID_FLAG);
554 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
557 struct nfsd4_access *access = &u->access;
559 if (access->ac_req_access & ~NFS3_ACCESS_FULL)
562 access->ac_resp_access = access->ac_req_access;
563 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
564 &access->ac_supported);
567 static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net)
570 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
573 * This is opaque to client, so no need to byte-swap. Use
574 * __force to keep sparse happy. y2038 time_t overflow is
575 * irrelevant in this usage.
577 verf[0] = (__force __be32)nn->nfssvc_boot.tv_sec;
578 verf[1] = (__force __be32)nn->nfssvc_boot.tv_nsec;
579 memcpy(verifier->data, verf, sizeof(verifier->data));
583 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
586 struct nfsd4_commit *commit = &u->commit;
588 gen_boot_verifier(&commit->co_verf, SVC_NET(rqstp));
589 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
594 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
597 struct nfsd4_create *create = &u->create;
602 fh_init(&resfh, NFS4_FHSIZE);
604 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_NOP);
608 status = check_attr_support(rqstp, cstate, create->cr_bmval,
613 current->fs->umask = create->cr_umask;
614 switch (create->cr_type) {
616 status = nfsd_symlink(rqstp, &cstate->current_fh,
617 create->cr_name, create->cr_namelen,
618 create->cr_data, &resfh);
622 status = nfserr_inval;
623 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
624 if (MAJOR(rdev) != create->cr_specdata1 ||
625 MINOR(rdev) != create->cr_specdata2)
627 status = nfsd_create(rqstp, &cstate->current_fh,
628 create->cr_name, create->cr_namelen,
629 &create->cr_iattr, S_IFBLK, rdev, &resfh);
633 status = nfserr_inval;
634 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
635 if (MAJOR(rdev) != create->cr_specdata1 ||
636 MINOR(rdev) != create->cr_specdata2)
638 status = nfsd_create(rqstp, &cstate->current_fh,
639 create->cr_name, create->cr_namelen,
640 &create->cr_iattr,S_IFCHR, rdev, &resfh);
644 status = nfsd_create(rqstp, &cstate->current_fh,
645 create->cr_name, create->cr_namelen,
646 &create->cr_iattr, S_IFSOCK, 0, &resfh);
650 status = nfsd_create(rqstp, &cstate->current_fh,
651 create->cr_name, create->cr_namelen,
652 &create->cr_iattr, S_IFIFO, 0, &resfh);
656 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
657 status = nfsd_create(rqstp, &cstate->current_fh,
658 create->cr_name, create->cr_namelen,
659 &create->cr_iattr, S_IFDIR, 0, &resfh);
663 status = nfserr_badtype;
669 if (create->cr_label.len)
670 nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval);
672 if (create->cr_acl != NULL)
673 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
676 fh_unlock(&cstate->current_fh);
677 set_change_info(&create->cr_cinfo, &cstate->current_fh);
678 fh_dup2(&cstate->current_fh, &resfh);
682 current->fs->umask = 0;
687 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
690 struct nfsd4_getattr *getattr = &u->getattr;
693 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
697 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
700 getattr->ga_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0];
701 getattr->ga_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1];
702 getattr->ga_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2];
704 getattr->ga_fhp = &cstate->current_fh;
709 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
712 struct nfsd4_link *link = &u->link;
715 status = nfsd_link(rqstp, &cstate->current_fh,
716 link->li_name, link->li_namelen, &cstate->save_fh);
718 set_change_info(&link->li_cinfo, &cstate->current_fh);
722 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
724 struct svc_fh tmp_fh;
727 fh_init(&tmp_fh, NFS4_FHSIZE);
728 ret = exp_pseudoroot(rqstp, &tmp_fh);
731 if (tmp_fh.fh_dentry == fh->fh_dentry) {
736 return nfsd_lookup(rqstp, fh, "..", 2, fh);
740 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
743 return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
747 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
750 return nfsd_lookup(rqstp, &cstate->current_fh,
751 u->lookup.lo_name, u->lookup.lo_len,
752 &cstate->current_fh);
756 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
759 struct nfsd4_read *read = &u->read;
762 read->rd_filp = NULL;
763 if (read->rd_offset >= OFFSET_MAX)
766 trace_nfsd_read_start(rqstp, &cstate->current_fh,
767 read->rd_offset, read->rd_length);
770 * If we do a zero copy read, then a client will see read data
771 * that reflects the state of the file *after* performing the
772 * following compound.
774 * To ensure proper ordering, we therefore turn off zero copy if
775 * the client wants us to do more in this compound:
777 if (!nfsd4_last_compound_op(rqstp))
778 clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags);
781 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
782 &read->rd_stateid, RD_STATE,
783 &read->rd_filp, &read->rd_tmp_file);
785 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
790 read->rd_rqstp = rqstp;
791 read->rd_fhp = &cstate->current_fh;
797 nfsd4_read_release(union nfsd4_op_u *u)
800 fput(u->read.rd_filp);
801 trace_nfsd_read_done(u->read.rd_rqstp, u->read.rd_fhp,
802 u->read.rd_offset, u->read.rd_length);
806 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
809 struct nfsd4_readdir *readdir = &u->readdir;
810 u64 cookie = readdir->rd_cookie;
811 static const nfs4_verifier zeroverf;
813 /* no need to check permission - this will be done in nfsd_readdir() */
815 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
818 readdir->rd_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0];
819 readdir->rd_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1];
820 readdir->rd_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2];
822 if ((cookie == 1) || (cookie == 2) ||
823 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
824 return nfserr_bad_cookie;
826 readdir->rd_rqstp = rqstp;
827 readdir->rd_fhp = &cstate->current_fh;
832 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
835 u->readlink.rl_rqstp = rqstp;
836 u->readlink.rl_fhp = &cstate->current_fh;
841 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
844 struct nfsd4_remove *remove = &u->remove;
847 if (opens_in_grace(SVC_NET(rqstp)))
849 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
850 remove->rm_name, remove->rm_namelen);
852 fh_unlock(&cstate->current_fh);
853 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
859 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
862 struct nfsd4_rename *rename = &u->rename;
865 if (opens_in_grace(SVC_NET(rqstp)) &&
866 !(cstate->save_fh.fh_export->ex_flags & NFSEXP_NOSUBTREECHECK))
868 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
869 rename->rn_snamelen, &cstate->current_fh,
870 rename->rn_tname, rename->rn_tnamelen);
873 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
874 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
879 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
882 struct nfsd4_secinfo *secinfo = &u->secinfo;
883 struct svc_export *exp;
884 struct dentry *dentry;
887 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
890 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
891 secinfo->si_name, secinfo->si_namelen,
895 fh_unlock(&cstate->current_fh);
896 if (d_really_is_negative(dentry)) {
900 secinfo->si_exp = exp;
902 if (cstate->minorversion)
903 /* See rfc 5661 section 2.6.3.1.1.8 */
904 fh_put(&cstate->current_fh);
909 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
914 switch (u->secinfo_no_name.sin_style) {
915 case NFS4_SECINFO_STYLE4_CURRENT_FH:
917 case NFS4_SECINFO_STYLE4_PARENT:
918 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
926 u->secinfo_no_name.sin_exp = exp_get(cstate->current_fh.fh_export);
927 fh_put(&cstate->current_fh);
932 nfsd4_secinfo_release(union nfsd4_op_u *u)
934 if (u->secinfo.si_exp)
935 exp_put(u->secinfo.si_exp);
939 nfsd4_secinfo_no_name_release(union nfsd4_op_u *u)
941 if (u->secinfo_no_name.sin_exp)
942 exp_put(u->secinfo_no_name.sin_exp);
946 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
949 struct nfsd4_setattr *setattr = &u->setattr;
950 __be32 status = nfs_ok;
953 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
954 status = nfs4_preprocess_stateid_op(rqstp, cstate,
955 &cstate->current_fh, &setattr->sa_stateid,
956 WR_STATE, NULL, NULL);
958 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
962 err = fh_want_write(&cstate->current_fh);
964 return nfserrno(err);
967 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
972 if (setattr->sa_acl != NULL)
973 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
977 if (setattr->sa_label.len)
978 status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh,
982 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
985 fh_drop_write(&cstate->current_fh);
990 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
993 struct nfsd4_write *write = &u->write;
994 stateid_t *stateid = &write->wr_stateid;
995 struct file *filp = NULL;
996 __be32 status = nfs_ok;
1000 if (write->wr_offset >= OFFSET_MAX)
1001 return nfserr_inval;
1003 cnt = write->wr_buflen;
1004 trace_nfsd_write_start(rqstp, &cstate->current_fh,
1005 write->wr_offset, cnt);
1006 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1007 stateid, WR_STATE, &filp, NULL);
1009 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
1013 write->wr_how_written = write->wr_stable_how;
1014 gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp));
1016 nvecs = svc_fill_write_vector(rqstp, write->wr_pagelist,
1017 &write->wr_head, write->wr_buflen);
1020 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec));
1022 status = nfsd_vfs_write(rqstp, &cstate->current_fh, filp,
1023 write->wr_offset, rqstp->rq_vec, nvecs, &cnt,
1024 write->wr_how_written);
1027 write->wr_bytes_written = cnt;
1028 trace_nfsd_write_done(rqstp, &cstate->current_fh,
1029 write->wr_offset, cnt);
1034 nfsd4_verify_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1035 stateid_t *src_stateid, struct file **src,
1036 stateid_t *dst_stateid, struct file **dst)
1040 if (!cstate->save_fh.fh_dentry)
1041 return nfserr_nofilehandle;
1043 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->save_fh,
1044 src_stateid, RD_STATE, src, NULL);
1046 dprintk("NFSD: %s: couldn't process src stateid!\n", __func__);
1050 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1051 dst_stateid, WR_STATE, dst, NULL);
1053 dprintk("NFSD: %s: couldn't process dst stateid!\n", __func__);
1057 /* fix up for NFS-specific error code */
1058 if (!S_ISREG(file_inode(*src)->i_mode) ||
1059 !S_ISREG(file_inode(*dst)->i_mode)) {
1060 status = nfserr_wrong_type;
1074 nfsd4_clone(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1075 union nfsd4_op_u *u)
1077 struct nfsd4_clone *clone = &u->clone;
1078 struct file *src, *dst;
1081 status = nfsd4_verify_copy(rqstp, cstate, &clone->cl_src_stateid, &src,
1082 &clone->cl_dst_stateid, &dst);
1086 status = nfsd4_clone_file_range(src, clone->cl_src_pos,
1087 dst, clone->cl_dst_pos, clone->cl_count);
1096 nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1097 union nfsd4_op_u *u)
1099 struct nfsd4_copy *copy = &u->copy;
1100 struct file *src, *dst;
1104 status = nfsd4_verify_copy(rqstp, cstate, ©->cp_src_stateid, &src,
1105 ©->cp_dst_stateid, &dst);
1109 bytes = nfsd_copy_file_range(src, copy->cp_src_pos,
1110 dst, copy->cp_dst_pos, copy->cp_count);
1113 status = nfserrno(bytes);
1115 copy->cp_res.wr_bytes_written = bytes;
1116 copy->cp_res.wr_stable_how = NFS_UNSTABLE;
1117 copy->cp_synchronous = 1;
1118 gen_boot_verifier(©->cp_res.wr_verifier, SVC_NET(rqstp));
1129 nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1130 struct nfsd4_fallocate *fallocate, int flags)
1132 __be32 status = nfserr_notsupp;
1135 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1136 &fallocate->falloc_stateid,
1137 WR_STATE, &file, NULL);
1138 if (status != nfs_ok) {
1139 dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n");
1143 status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, file,
1144 fallocate->falloc_offset,
1145 fallocate->falloc_length,
1152 nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1153 union nfsd4_op_u *u)
1155 return nfsd4_fallocate(rqstp, cstate, &u->allocate, 0);
1159 nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1160 union nfsd4_op_u *u)
1162 return nfsd4_fallocate(rqstp, cstate, &u->deallocate,
1163 FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE);
1167 nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1168 union nfsd4_op_u *u)
1170 struct nfsd4_seek *seek = &u->seek;
1175 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1176 &seek->seek_stateid,
1177 RD_STATE, &file, NULL);
1179 dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n");
1183 switch (seek->seek_whence) {
1184 case NFS4_CONTENT_DATA:
1187 case NFS4_CONTENT_HOLE:
1191 status = nfserr_union_notsupp;
1196 * Note: This call does change file->f_pos, but nothing in NFSD
1197 * should ever file->f_pos.
1199 seek->seek_pos = vfs_llseek(file, seek->seek_offset, whence);
1200 if (seek->seek_pos < 0)
1201 status = nfserrno(seek->seek_pos);
1202 else if (seek->seek_pos >= i_size_read(file_inode(file)))
1203 seek->seek_eof = true;
1210 /* This routine never returns NFS_OK! If there are no other errors, it
1211 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
1212 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
1213 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
1216 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1217 struct nfsd4_verify *verify)
1223 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
1227 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
1231 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
1232 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
1233 return nfserr_inval;
1234 if (verify->ve_attrlen & 3)
1235 return nfserr_inval;
1238 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
1240 count = 4 + (verify->ve_attrlen >> 2);
1241 buf = kmalloc(count << 2, GFP_KERNEL);
1243 return nfserr_jukebox;
1246 status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh,
1247 cstate->current_fh.fh_export,
1248 cstate->current_fh.fh_dentry,
1252 * If nfsd4_encode_fattr() ran out of space, assume that's because
1253 * the attributes are longer (hence different) than those given:
1255 if (status == nfserr_resource)
1256 status = nfserr_not_same;
1261 p = buf + 1 + ntohl(buf[0]);
1262 status = nfserr_not_same;
1263 if (ntohl(*p++) != verify->ve_attrlen)
1265 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
1266 status = nfserr_same;
1274 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1275 union nfsd4_op_u *u)
1279 status = _nfsd4_verify(rqstp, cstate, &u->verify);
1280 return status == nfserr_not_same ? nfs_ok : status;
1284 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1285 union nfsd4_op_u *u)
1289 status = _nfsd4_verify(rqstp, cstate, &u->nverify);
1290 return status == nfserr_same ? nfs_ok : status;
1293 #ifdef CONFIG_NFSD_PNFS
1294 static const struct nfsd4_layout_ops *
1295 nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type)
1297 if (!exp->ex_layout_types) {
1298 dprintk("%s: export does not support pNFS\n", __func__);
1302 if (layout_type >= LAYOUT_TYPE_MAX ||
1303 !(exp->ex_layout_types & (1 << layout_type))) {
1304 dprintk("%s: layout type %d not supported\n",
1305 __func__, layout_type);
1309 return nfsd4_layout_ops[layout_type];
1313 nfsd4_getdeviceinfo(struct svc_rqst *rqstp,
1314 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
1316 struct nfsd4_getdeviceinfo *gdp = &u->getdeviceinfo;
1317 const struct nfsd4_layout_ops *ops;
1318 struct nfsd4_deviceid_map *map;
1319 struct svc_export *exp;
1322 dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n",
1324 gdp->gd_layout_type,
1325 gdp->gd_devid.fsid_idx, gdp->gd_devid.generation,
1328 map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx);
1330 dprintk("%s: couldn't find device ID to export mapping!\n",
1332 return nfserr_noent;
1335 exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid);
1337 dprintk("%s: could not find device id\n", __func__);
1338 return nfserr_noent;
1341 nfserr = nfserr_layoutunavailable;
1342 ops = nfsd4_layout_verify(exp, gdp->gd_layout_type);
1347 if (gdp->gd_maxcount != 0) {
1348 nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb,
1349 rqstp, cstate->session->se_client, gdp);
1352 gdp->gd_notify_types &= ops->notify_types;
1359 nfsd4_getdeviceinfo_release(union nfsd4_op_u *u)
1361 kfree(u->getdeviceinfo.gd_device);
1365 nfsd4_layoutget(struct svc_rqst *rqstp,
1366 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
1368 struct nfsd4_layoutget *lgp = &u->layoutget;
1369 struct svc_fh *current_fh = &cstate->current_fh;
1370 const struct nfsd4_layout_ops *ops;
1371 struct nfs4_layout_stateid *ls;
1373 int accmode = NFSD_MAY_READ_IF_EXEC;
1375 switch (lgp->lg_seg.iomode) {
1377 accmode |= NFSD_MAY_READ;
1380 accmode |= NFSD_MAY_READ | NFSD_MAY_WRITE;
1383 dprintk("%s: invalid iomode %d\n",
1384 __func__, lgp->lg_seg.iomode);
1385 nfserr = nfserr_badiomode;
1389 nfserr = fh_verify(rqstp, current_fh, 0, accmode);
1393 nfserr = nfserr_layoutunavailable;
1394 ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type);
1399 * Verify minlength and range as per RFC5661:
1400 * o If loga_length is less than loga_minlength,
1401 * the metadata server MUST return NFS4ERR_INVAL.
1402 * o If the sum of loga_offset and loga_minlength exceeds
1403 * NFS4_UINT64_MAX, and loga_minlength is not
1404 * NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result.
1405 * o If the sum of loga_offset and loga_length exceeds
1406 * NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX,
1407 * the error NFS4ERR_INVAL MUST result.
1409 nfserr = nfserr_inval;
1410 if (lgp->lg_seg.length < lgp->lg_minlength ||
1411 (lgp->lg_minlength != NFS4_MAX_UINT64 &&
1412 lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) ||
1413 (lgp->lg_seg.length != NFS4_MAX_UINT64 &&
1414 lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset))
1416 if (lgp->lg_seg.length == 0)
1419 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid,
1420 true, lgp->lg_layout_type, &ls);
1422 trace_nfsd_layout_get_lookup_fail(&lgp->lg_sid);
1426 nfserr = nfserr_recallconflict;
1427 if (atomic_read(&ls->ls_stid.sc_file->fi_lo_recalls))
1430 nfserr = ops->proc_layoutget(d_inode(current_fh->fh_dentry),
1435 nfserr = nfsd4_insert_layout(lgp, ls);
1438 mutex_unlock(&ls->ls_mutex);
1439 nfs4_put_stid(&ls->ls_stid);
1445 nfsd4_layoutget_release(union nfsd4_op_u *u)
1447 kfree(u->layoutget.lg_content);
1451 nfsd4_layoutcommit(struct svc_rqst *rqstp,
1452 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
1454 struct nfsd4_layoutcommit *lcp = &u->layoutcommit;
1455 const struct nfsd4_layout_seg *seg = &lcp->lc_seg;
1456 struct svc_fh *current_fh = &cstate->current_fh;
1457 const struct nfsd4_layout_ops *ops;
1458 loff_t new_size = lcp->lc_last_wr + 1;
1459 struct inode *inode;
1460 struct nfs4_layout_stateid *ls;
1463 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE);
1467 nfserr = nfserr_layoutunavailable;
1468 ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type);
1471 inode = d_inode(current_fh->fh_dentry);
1473 nfserr = nfserr_inval;
1474 if (new_size <= seg->offset) {
1475 dprintk("pnfsd: last write before layout segment\n");
1478 if (new_size > seg->offset + seg->length) {
1479 dprintk("pnfsd: last write beyond layout segment\n");
1482 if (!lcp->lc_newoffset && new_size > i_size_read(inode)) {
1483 dprintk("pnfsd: layoutcommit beyond EOF\n");
1487 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid,
1488 false, lcp->lc_layout_type,
1491 trace_nfsd_layout_commit_lookup_fail(&lcp->lc_sid);
1492 /* fixup error code as per RFC5661 */
1493 if (nfserr == nfserr_bad_stateid)
1494 nfserr = nfserr_badlayout;
1498 /* LAYOUTCOMMIT does not require any serialization */
1499 mutex_unlock(&ls->ls_mutex);
1501 if (new_size > i_size_read(inode)) {
1502 lcp->lc_size_chg = 1;
1503 lcp->lc_newsize = new_size;
1505 lcp->lc_size_chg = 0;
1508 nfserr = ops->proc_layoutcommit(inode, lcp);
1509 nfs4_put_stid(&ls->ls_stid);
1515 nfsd4_layoutreturn(struct svc_rqst *rqstp,
1516 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
1518 struct nfsd4_layoutreturn *lrp = &u->layoutreturn;
1519 struct svc_fh *current_fh = &cstate->current_fh;
1522 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP);
1526 nfserr = nfserr_layoutunavailable;
1527 if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type))
1530 switch (lrp->lr_seg.iomode) {
1536 dprintk("%s: invalid iomode %d\n", __func__,
1537 lrp->lr_seg.iomode);
1538 nfserr = nfserr_inval;
1542 switch (lrp->lr_return_type) {
1544 nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp);
1548 nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp);
1551 dprintk("%s: invalid return_type %d\n", __func__,
1552 lrp->lr_return_type);
1553 nfserr = nfserr_inval;
1559 #endif /* CONFIG_NFSD_PNFS */
1565 nfsd4_proc_null(struct svc_rqst *rqstp)
1570 static inline void nfsd4_increment_op_stats(u32 opnum)
1572 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
1573 nfsdstats.nfs4_opcount[opnum]++;
1576 static const struct nfsd4_operation nfsd4_ops[];
1578 static const char *nfsd4_op_name(unsigned opnum);
1581 * Enforce NFSv4.1 COMPOUND ordering rules:
1583 * Also note, enforced elsewhere:
1584 * - SEQUENCE other than as first op results in
1585 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1586 * - BIND_CONN_TO_SESSION must be the only op in its compound.
1587 * (Enforced in nfsd4_bind_conn_to_session().)
1588 * - DESTROY_SESSION must be the final operation in a compound, if
1589 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
1590 * (Enforced in nfsd4_destroy_session().)
1592 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
1594 struct nfsd4_op *first_op = &args->ops[0];
1596 /* These ordering requirements don't apply to NFSv4.0: */
1597 if (args->minorversion == 0)
1599 /* This is weird, but OK, not our problem: */
1600 if (args->opcnt == 0)
1602 if (first_op->status == nfserr_op_illegal)
1604 if (!(nfsd4_ops[first_op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
1605 return nfserr_op_not_in_session;
1606 if (first_op->opnum == OP_SEQUENCE)
1609 * So first_op is something allowed outside a session, like
1610 * EXCHANGE_ID; but then it has to be the only op in the
1613 if (args->opcnt != 1)
1614 return nfserr_not_only_op;
1618 const struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
1620 return &nfsd4_ops[op->opnum];
1623 bool nfsd4_cache_this_op(struct nfsd4_op *op)
1625 if (op->opnum == OP_ILLEGAL)
1627 return OPDESC(op)->op_flags & OP_CACHEME;
1630 static bool need_wrongsec_check(struct svc_rqst *rqstp)
1632 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1633 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
1634 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
1635 struct nfsd4_op *next = &argp->ops[resp->opcnt];
1636 const struct nfsd4_operation *thisd = OPDESC(this);
1637 const struct nfsd4_operation *nextd;
1640 * Most ops check wronsec on our own; only the putfh-like ops
1641 * have special rules.
1643 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
1646 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
1647 * put-filehandle operation if we're not going to use the
1650 if (argp->opcnt == resp->opcnt)
1652 if (next->opnum == OP_ILLEGAL)
1654 nextd = OPDESC(next);
1656 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
1657 * errors themselves as necessary; others should check for them
1660 return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
1663 static void svcxdr_init_encode(struct svc_rqst *rqstp,
1664 struct nfsd4_compoundres *resp)
1666 struct xdr_stream *xdr = &resp->xdr;
1667 struct xdr_buf *buf = &rqstp->rq_res;
1668 struct kvec *head = buf->head;
1672 xdr->p = head->iov_base + head->iov_len;
1673 xdr->end = head->iov_base + PAGE_SIZE - rqstp->rq_auth_slack;
1674 /* Tail and page_len should be zero at this point: */
1675 buf->len = buf->head[0].iov_len;
1676 xdr->scratch.iov_len = 0;
1677 xdr->page_ptr = buf->pages - 1;
1678 buf->buflen = PAGE_SIZE * (1 + rqstp->rq_page_end - buf->pages)
1679 - rqstp->rq_auth_slack;
1686 nfsd4_proc_compound(struct svc_rqst *rqstp)
1688 struct nfsd4_compoundargs *args = rqstp->rq_argp;
1689 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1690 struct nfsd4_op *op;
1691 struct nfsd4_compound_state *cstate = &resp->cstate;
1692 struct svc_fh *current_fh = &cstate->current_fh;
1693 struct svc_fh *save_fh = &cstate->save_fh;
1696 svcxdr_init_encode(rqstp, resp);
1697 resp->tagp = resp->xdr.p;
1698 /* reserve space for: taglen, tag, and opcnt */
1699 xdr_reserve_space(&resp->xdr, 8 + args->taglen);
1700 resp->taglen = args->taglen;
1701 resp->tag = args->tag;
1702 resp->rqstp = rqstp;
1703 cstate->minorversion = args->minorversion;
1704 fh_init(current_fh, NFS4_FHSIZE);
1705 fh_init(save_fh, NFS4_FHSIZE);
1707 * Don't use the deferral mechanism for NFSv4; compounds make it
1708 * too hard to avoid non-idempotency problems.
1710 clear_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
1713 * According to RFC3010, this takes precedence over all other errors.
1715 status = nfserr_minor_vers_mismatch;
1716 if (nfsd_minorversion(args->minorversion, NFSD_TEST) <= 0)
1718 status = nfserr_resource;
1719 if (args->opcnt > NFSD_MAX_OPS_PER_COMPOUND)
1722 status = nfs41_check_op_ordering(args);
1725 op->status = status;
1730 trace_nfsd_compound(rqstp, args->opcnt);
1731 while (!status && resp->opcnt < args->opcnt) {
1732 op = &args->ops[resp->opcnt++];
1735 * The XDR decode routines may have pre-set op->status;
1736 * for example, if there is a miscellaneous XDR error
1737 * it will be set to nfserr_bad_xdr.
1740 if (op->opnum == OP_OPEN)
1741 op->status = nfsd4_open_omfg(rqstp, cstate, op);
1745 if (!current_fh->fh_dentry) {
1746 if (!(op->opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
1747 op->status = nfserr_nofilehandle;
1750 } else if (current_fh->fh_export->ex_fslocs.migrated &&
1751 !(op->opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
1752 op->status = nfserr_moved;
1756 fh_clear_wcc(current_fh);
1758 /* If op is non-idempotent */
1759 if (op->opdesc->op_flags & OP_MODIFIES_SOMETHING) {
1761 * Don't execute this op if we couldn't encode a
1764 u32 plen = op->opdesc->op_rsize_bop(rqstp, op);
1766 * Plus if there's another operation, make sure
1767 * we'll have space to at least encode an error:
1769 if (resp->opcnt < args->opcnt)
1770 plen += COMPOUND_ERR_SLACK_SPACE;
1771 op->status = nfsd4_check_resp_size(resp, plen);
1777 if (op->opdesc->op_get_currentstateid)
1778 op->opdesc->op_get_currentstateid(cstate, &op->u);
1779 op->status = op->opdesc->op_func(rqstp, cstate, &op->u);
1781 /* Only from SEQUENCE */
1782 if (cstate->status == nfserr_replay_cache) {
1783 dprintk("%s NFS4.1 replay from cache\n", __func__);
1784 status = op->status;
1788 if (op->opdesc->op_set_currentstateid)
1789 op->opdesc->op_set_currentstateid(cstate, &op->u);
1791 if (op->opdesc->op_flags & OP_CLEAR_STATEID)
1792 clear_current_stateid(cstate);
1794 if (need_wrongsec_check(rqstp))
1795 op->status = check_nfsd_access(current_fh->fh_export, rqstp);
1798 if (op->status == nfserr_replay_me) {
1799 op->replay = &cstate->replay_owner->so_replay;
1800 nfsd4_encode_replay(&resp->xdr, op);
1801 status = op->status = op->replay->rp_status;
1803 nfsd4_encode_operation(resp, op);
1804 status = op->status;
1807 trace_nfsd_compound_status(args->opcnt, resp->opcnt, status,
1808 nfsd4_op_name(op->opnum));
1810 nfsd4_cstate_clear_replay(cstate);
1811 nfsd4_increment_op_stats(op->opnum);
1814 cstate->status = status;
1817 BUG_ON(cstate->replay_owner);
1819 /* Reset deferral mechanism for RPC deferrals */
1820 set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
1821 dprintk("nfsv4 compound returned %d\n", ntohl(status));
1825 #define op_encode_hdr_size (2)
1826 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
1827 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
1828 #define op_encode_change_info_maxsz (5)
1829 #define nfs4_fattr_bitmap_maxsz (4)
1831 /* We'll fall back on returning no lockowner if run out of space: */
1832 #define op_encode_lockowner_maxsz (0)
1833 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz)
1835 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1837 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz)
1838 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \
1839 op_encode_ace_maxsz)
1841 #define op_encode_channel_attrs_maxsz (6 + 1 + 1)
1843 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1845 return (op_encode_hdr_size) * sizeof(__be32);
1848 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1850 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
1853 static inline u32 nfsd4_access_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1855 /* ac_supported, ac_resp_access */
1856 return (op_encode_hdr_size + 2)* sizeof(__be32);
1859 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1861 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1864 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1866 return (op_encode_hdr_size + op_encode_change_info_maxsz
1867 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1871 * Note since this is an idempotent operation we won't insist on failing
1872 * the op prematurely if the estimate is too large. We may turn off splice
1873 * reads unnecessarily.
1875 static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp,
1876 struct nfsd4_op *op)
1878 u32 *bmap = op->u.getattr.ga_bmval;
1879 u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2];
1882 if (bmap0 & FATTR4_WORD0_ACL)
1883 return svc_max_payload(rqstp);
1884 if (bmap0 & FATTR4_WORD0_FS_LOCATIONS)
1885 return svc_max_payload(rqstp);
1887 if (bmap1 & FATTR4_WORD1_OWNER) {
1888 ret += IDMAP_NAMESZ + 4;
1889 bmap1 &= ~FATTR4_WORD1_OWNER;
1891 if (bmap1 & FATTR4_WORD1_OWNER_GROUP) {
1892 ret += IDMAP_NAMESZ + 4;
1893 bmap1 &= ~FATTR4_WORD1_OWNER_GROUP;
1895 if (bmap0 & FATTR4_WORD0_FILEHANDLE) {
1896 ret += NFS4_FHSIZE + 4;
1897 bmap0 &= ~FATTR4_WORD0_FILEHANDLE;
1899 if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) {
1900 ret += NFS4_MAXLABELLEN + 12;
1901 bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL;
1904 * Largest of remaining attributes are 16 bytes (e.g.,
1905 * supported_attributes)
1907 ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2));
1908 /* bitmask, length */
1913 static inline u32 nfsd4_getfh_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1915 return (op_encode_hdr_size + 1) * sizeof(__be32) + NFS4_FHSIZE;
1918 static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1920 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1924 static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1926 return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
1930 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1932 return (op_encode_hdr_size + op_encode_stateid_maxsz
1933 + op_encode_change_info_maxsz + 1
1934 + nfs4_fattr_bitmap_maxsz
1935 + op_encode_delegation_maxsz) * sizeof(__be32);
1938 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1940 u32 maxcount = 0, rlen = 0;
1942 maxcount = svc_max_payload(rqstp);
1943 rlen = min(op->u.read.rd_length, maxcount);
1945 return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32);
1948 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1950 u32 maxcount = 0, rlen = 0;
1952 maxcount = svc_max_payload(rqstp);
1953 rlen = min(op->u.readdir.rd_maxcount, maxcount);
1955 return (op_encode_hdr_size + op_encode_verifier_maxsz +
1956 XDR_QUADLEN(rlen)) * sizeof(__be32);
1959 static inline u32 nfsd4_readlink_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1961 return (op_encode_hdr_size + 1) * sizeof(__be32) + PAGE_SIZE;
1964 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1966 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1970 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1972 return (op_encode_hdr_size + op_encode_change_info_maxsz
1973 + op_encode_change_info_maxsz) * sizeof(__be32);
1976 static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp,
1977 struct nfsd4_op *op)
1979 return (op_encode_hdr_size
1980 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32);
1983 static inline u32 nfsd4_test_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1985 return (op_encode_hdr_size + 1 + op->u.test_stateid.ts_num_ids)
1989 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1991 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1994 static inline u32 nfsd4_secinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1996 return (op_encode_hdr_size + RPC_AUTH_MAXFLAVOR *
1997 (4 + XDR_QUADLEN(GSS_OID_MAX_LEN))) * sizeof(__be32);
2000 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2002 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) *
2006 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2008 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32);
2011 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2013 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
2014 1 + 1 + /* eir_flags, spr_how */\
2015 4 + /* spo_must_enforce & _allow with bitmap */\
2016 2 + /*eir_server_owner.so_minor_id */\
2017 /* eir_server_owner.so_major_id<> */\
2018 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
2019 /* eir_server_scope<> */\
2020 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
2021 1 + /* eir_server_impl_id array length */\
2022 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
2025 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2027 return (op_encode_hdr_size + \
2028 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
2029 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
2032 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2034 return (op_encode_hdr_size + \
2035 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
2036 2 + /* csr_sequence, csr_flags */\
2037 op_encode_channel_attrs_maxsz + \
2038 op_encode_channel_attrs_maxsz) * sizeof(__be32);
2041 static inline u32 nfsd4_copy_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2043 return (op_encode_hdr_size +
2044 1 /* wr_callback */ +
2045 op_encode_stateid_maxsz /* wr_callback */ +
2047 1 /* wr_committed */ +
2048 op_encode_verifier_maxsz +
2049 1 /* cr_consecutive */ +
2050 1 /* cr_synchronous */) * sizeof(__be32);
2053 #ifdef CONFIG_NFSD_PNFS
2054 static inline u32 nfsd4_getdeviceinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2056 u32 maxcount = 0, rlen = 0;
2058 maxcount = svc_max_payload(rqstp);
2059 rlen = min(op->u.getdeviceinfo.gd_maxcount, maxcount);
2061 return (op_encode_hdr_size +
2062 1 /* gd_layout_type*/ +
2064 2 /* gd_notify_types */) * sizeof(__be32);
2068 * At this stage we don't really know what layout driver will handle the request,
2069 * so we need to define an arbitrary upper bound here.
2071 #define MAX_LAYOUT_SIZE 128
2072 static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2074 return (op_encode_hdr_size +
2075 1 /* logr_return_on_close */ +
2076 op_encode_stateid_maxsz +
2077 1 /* nr of layouts */ +
2078 MAX_LAYOUT_SIZE) * sizeof(__be32);
2081 static inline u32 nfsd4_layoutcommit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2083 return (op_encode_hdr_size +
2084 1 /* locr_newsize */ +
2085 2 /* ns_size */) * sizeof(__be32);
2088 static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2090 return (op_encode_hdr_size +
2091 1 /* lrs_stateid */ +
2092 op_encode_stateid_maxsz) * sizeof(__be32);
2094 #endif /* CONFIG_NFSD_PNFS */
2097 static inline u32 nfsd4_seek_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2099 return (op_encode_hdr_size + 3) * sizeof(__be32);
2102 static const struct nfsd4_operation nfsd4_ops[] = {
2104 .op_func = nfsd4_access,
2105 .op_name = "OP_ACCESS",
2106 .op_rsize_bop = nfsd4_access_rsize,
2109 .op_func = nfsd4_close,
2110 .op_flags = OP_MODIFIES_SOMETHING,
2111 .op_name = "OP_CLOSE",
2112 .op_rsize_bop = nfsd4_status_stateid_rsize,
2113 .op_get_currentstateid = nfsd4_get_closestateid,
2114 .op_set_currentstateid = nfsd4_set_closestateid,
2117 .op_func = nfsd4_commit,
2118 .op_flags = OP_MODIFIES_SOMETHING,
2119 .op_name = "OP_COMMIT",
2120 .op_rsize_bop = nfsd4_commit_rsize,
2123 .op_func = nfsd4_create,
2124 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID,
2125 .op_name = "OP_CREATE",
2126 .op_rsize_bop = nfsd4_create_rsize,
2128 [OP_DELEGRETURN] = {
2129 .op_func = nfsd4_delegreturn,
2130 .op_flags = OP_MODIFIES_SOMETHING,
2131 .op_name = "OP_DELEGRETURN",
2132 .op_rsize_bop = nfsd4_only_status_rsize,
2133 .op_get_currentstateid = nfsd4_get_delegreturnstateid,
2136 .op_func = nfsd4_getattr,
2137 .op_flags = ALLOWED_ON_ABSENT_FS,
2138 .op_rsize_bop = nfsd4_getattr_rsize,
2139 .op_name = "OP_GETATTR",
2142 .op_func = nfsd4_getfh,
2143 .op_name = "OP_GETFH",
2144 .op_rsize_bop = nfsd4_getfh_rsize,
2147 .op_func = nfsd4_link,
2148 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
2150 .op_name = "OP_LINK",
2151 .op_rsize_bop = nfsd4_link_rsize,
2154 .op_func = nfsd4_lock,
2155 .op_flags = OP_MODIFIES_SOMETHING |
2156 OP_NONTRIVIAL_ERROR_ENCODE,
2157 .op_name = "OP_LOCK",
2158 .op_rsize_bop = nfsd4_lock_rsize,
2159 .op_set_currentstateid = nfsd4_set_lockstateid,
2162 .op_func = nfsd4_lockt,
2163 .op_flags = OP_NONTRIVIAL_ERROR_ENCODE,
2164 .op_name = "OP_LOCKT",
2165 .op_rsize_bop = nfsd4_lock_rsize,
2168 .op_func = nfsd4_locku,
2169 .op_flags = OP_MODIFIES_SOMETHING,
2170 .op_name = "OP_LOCKU",
2171 .op_rsize_bop = nfsd4_status_stateid_rsize,
2172 .op_get_currentstateid = nfsd4_get_lockustateid,
2175 .op_func = nfsd4_lookup,
2176 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
2177 .op_name = "OP_LOOKUP",
2178 .op_rsize_bop = nfsd4_only_status_rsize,
2181 .op_func = nfsd4_lookupp,
2182 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
2183 .op_name = "OP_LOOKUPP",
2184 .op_rsize_bop = nfsd4_only_status_rsize,
2187 .op_func = nfsd4_nverify,
2188 .op_name = "OP_NVERIFY",
2189 .op_rsize_bop = nfsd4_only_status_rsize,
2192 .op_func = nfsd4_open,
2193 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
2194 .op_name = "OP_OPEN",
2195 .op_rsize_bop = nfsd4_open_rsize,
2196 .op_set_currentstateid = nfsd4_set_openstateid,
2198 [OP_OPEN_CONFIRM] = {
2199 .op_func = nfsd4_open_confirm,
2200 .op_flags = OP_MODIFIES_SOMETHING,
2201 .op_name = "OP_OPEN_CONFIRM",
2202 .op_rsize_bop = nfsd4_status_stateid_rsize,
2204 [OP_OPEN_DOWNGRADE] = {
2205 .op_func = nfsd4_open_downgrade,
2206 .op_flags = OP_MODIFIES_SOMETHING,
2207 .op_name = "OP_OPEN_DOWNGRADE",
2208 .op_rsize_bop = nfsd4_status_stateid_rsize,
2209 .op_get_currentstateid = nfsd4_get_opendowngradestateid,
2210 .op_set_currentstateid = nfsd4_set_opendowngradestateid,
2213 .op_func = nfsd4_putfh,
2214 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2215 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
2216 .op_name = "OP_PUTFH",
2217 .op_rsize_bop = nfsd4_only_status_rsize,
2220 .op_func = nfsd4_putrootfh,
2221 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2222 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
2223 .op_name = "OP_PUTPUBFH",
2224 .op_rsize_bop = nfsd4_only_status_rsize,
2227 .op_func = nfsd4_putrootfh,
2228 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2229 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
2230 .op_name = "OP_PUTROOTFH",
2231 .op_rsize_bop = nfsd4_only_status_rsize,
2234 .op_func = nfsd4_read,
2235 .op_release = nfsd4_read_release,
2236 .op_name = "OP_READ",
2237 .op_rsize_bop = nfsd4_read_rsize,
2238 .op_get_currentstateid = nfsd4_get_readstateid,
2241 .op_func = nfsd4_readdir,
2242 .op_name = "OP_READDIR",
2243 .op_rsize_bop = nfsd4_readdir_rsize,
2246 .op_func = nfsd4_readlink,
2247 .op_name = "OP_READLINK",
2248 .op_rsize_bop = nfsd4_readlink_rsize,
2251 .op_func = nfsd4_remove,
2252 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2253 .op_name = "OP_REMOVE",
2254 .op_rsize_bop = nfsd4_remove_rsize,
2257 .op_func = nfsd4_rename,
2258 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2259 .op_name = "OP_RENAME",
2260 .op_rsize_bop = nfsd4_rename_rsize,
2263 .op_func = nfsd4_renew,
2264 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2265 | OP_MODIFIES_SOMETHING,
2266 .op_name = "OP_RENEW",
2267 .op_rsize_bop = nfsd4_only_status_rsize,
2271 .op_func = nfsd4_restorefh,
2272 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2273 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
2274 .op_name = "OP_RESTOREFH",
2275 .op_rsize_bop = nfsd4_only_status_rsize,
2278 .op_func = nfsd4_savefh,
2279 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
2280 .op_name = "OP_SAVEFH",
2281 .op_rsize_bop = nfsd4_only_status_rsize,
2284 .op_func = nfsd4_secinfo,
2285 .op_release = nfsd4_secinfo_release,
2286 .op_flags = OP_HANDLES_WRONGSEC,
2287 .op_name = "OP_SECINFO",
2288 .op_rsize_bop = nfsd4_secinfo_rsize,
2291 .op_func = nfsd4_setattr,
2292 .op_name = "OP_SETATTR",
2293 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME
2294 | OP_NONTRIVIAL_ERROR_ENCODE,
2295 .op_rsize_bop = nfsd4_setattr_rsize,
2296 .op_get_currentstateid = nfsd4_get_setattrstateid,
2298 [OP_SETCLIENTID] = {
2299 .op_func = nfsd4_setclientid,
2300 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2301 | OP_MODIFIES_SOMETHING | OP_CACHEME
2302 | OP_NONTRIVIAL_ERROR_ENCODE,
2303 .op_name = "OP_SETCLIENTID",
2304 .op_rsize_bop = nfsd4_setclientid_rsize,
2306 [OP_SETCLIENTID_CONFIRM] = {
2307 .op_func = nfsd4_setclientid_confirm,
2308 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2309 | OP_MODIFIES_SOMETHING | OP_CACHEME,
2310 .op_name = "OP_SETCLIENTID_CONFIRM",
2311 .op_rsize_bop = nfsd4_only_status_rsize,
2314 .op_func = nfsd4_verify,
2315 .op_name = "OP_VERIFY",
2316 .op_rsize_bop = nfsd4_only_status_rsize,
2319 .op_func = nfsd4_write,
2320 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2321 .op_name = "OP_WRITE",
2322 .op_rsize_bop = nfsd4_write_rsize,
2323 .op_get_currentstateid = nfsd4_get_writestateid,
2325 [OP_RELEASE_LOCKOWNER] = {
2326 .op_func = nfsd4_release_lockowner,
2327 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2328 | OP_MODIFIES_SOMETHING,
2329 .op_name = "OP_RELEASE_LOCKOWNER",
2330 .op_rsize_bop = nfsd4_only_status_rsize,
2333 /* NFSv4.1 operations */
2334 [OP_EXCHANGE_ID] = {
2335 .op_func = nfsd4_exchange_id,
2336 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2337 | OP_MODIFIES_SOMETHING,
2338 .op_name = "OP_EXCHANGE_ID",
2339 .op_rsize_bop = nfsd4_exchange_id_rsize,
2341 [OP_BACKCHANNEL_CTL] = {
2342 .op_func = nfsd4_backchannel_ctl,
2343 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
2344 .op_name = "OP_BACKCHANNEL_CTL",
2345 .op_rsize_bop = nfsd4_only_status_rsize,
2347 [OP_BIND_CONN_TO_SESSION] = {
2348 .op_func = nfsd4_bind_conn_to_session,
2349 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2350 | OP_MODIFIES_SOMETHING,
2351 .op_name = "OP_BIND_CONN_TO_SESSION",
2352 .op_rsize_bop = nfsd4_bind_conn_to_session_rsize,
2354 [OP_CREATE_SESSION] = {
2355 .op_func = nfsd4_create_session,
2356 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2357 | OP_MODIFIES_SOMETHING,
2358 .op_name = "OP_CREATE_SESSION",
2359 .op_rsize_bop = nfsd4_create_session_rsize,
2361 [OP_DESTROY_SESSION] = {
2362 .op_func = nfsd4_destroy_session,
2363 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2364 | OP_MODIFIES_SOMETHING,
2365 .op_name = "OP_DESTROY_SESSION",
2366 .op_rsize_bop = nfsd4_only_status_rsize,
2369 .op_func = nfsd4_sequence,
2370 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
2371 .op_name = "OP_SEQUENCE",
2372 .op_rsize_bop = nfsd4_sequence_rsize,
2374 [OP_DESTROY_CLIENTID] = {
2375 .op_func = nfsd4_destroy_clientid,
2376 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2377 | OP_MODIFIES_SOMETHING,
2378 .op_name = "OP_DESTROY_CLIENTID",
2379 .op_rsize_bop = nfsd4_only_status_rsize,
2381 [OP_RECLAIM_COMPLETE] = {
2382 .op_func = nfsd4_reclaim_complete,
2383 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
2384 .op_name = "OP_RECLAIM_COMPLETE",
2385 .op_rsize_bop = nfsd4_only_status_rsize,
2387 [OP_SECINFO_NO_NAME] = {
2388 .op_func = nfsd4_secinfo_no_name,
2389 .op_release = nfsd4_secinfo_no_name_release,
2390 .op_flags = OP_HANDLES_WRONGSEC,
2391 .op_name = "OP_SECINFO_NO_NAME",
2392 .op_rsize_bop = nfsd4_secinfo_rsize,
2394 [OP_TEST_STATEID] = {
2395 .op_func = nfsd4_test_stateid,
2396 .op_flags = ALLOWED_WITHOUT_FH,
2397 .op_name = "OP_TEST_STATEID",
2398 .op_rsize_bop = nfsd4_test_stateid_rsize,
2400 [OP_FREE_STATEID] = {
2401 .op_func = nfsd4_free_stateid,
2402 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
2403 .op_name = "OP_FREE_STATEID",
2404 .op_get_currentstateid = nfsd4_get_freestateid,
2405 .op_rsize_bop = nfsd4_only_status_rsize,
2407 #ifdef CONFIG_NFSD_PNFS
2408 [OP_GETDEVICEINFO] = {
2409 .op_func = nfsd4_getdeviceinfo,
2410 .op_release = nfsd4_getdeviceinfo_release,
2411 .op_flags = ALLOWED_WITHOUT_FH,
2412 .op_name = "OP_GETDEVICEINFO",
2413 .op_rsize_bop = nfsd4_getdeviceinfo_rsize,
2416 .op_func = nfsd4_layoutget,
2417 .op_release = nfsd4_layoutget_release,
2418 .op_flags = OP_MODIFIES_SOMETHING,
2419 .op_name = "OP_LAYOUTGET",
2420 .op_rsize_bop = nfsd4_layoutget_rsize,
2422 [OP_LAYOUTCOMMIT] = {
2423 .op_func = nfsd4_layoutcommit,
2424 .op_flags = OP_MODIFIES_SOMETHING,
2425 .op_name = "OP_LAYOUTCOMMIT",
2426 .op_rsize_bop = nfsd4_layoutcommit_rsize,
2428 [OP_LAYOUTRETURN] = {
2429 .op_func = nfsd4_layoutreturn,
2430 .op_flags = OP_MODIFIES_SOMETHING,
2431 .op_name = "OP_LAYOUTRETURN",
2432 .op_rsize_bop = nfsd4_layoutreturn_rsize,
2434 #endif /* CONFIG_NFSD_PNFS */
2436 /* NFSv4.2 operations */
2438 .op_func = nfsd4_allocate,
2439 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2440 .op_name = "OP_ALLOCATE",
2441 .op_rsize_bop = nfsd4_only_status_rsize,
2444 .op_func = nfsd4_deallocate,
2445 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2446 .op_name = "OP_DEALLOCATE",
2447 .op_rsize_bop = nfsd4_only_status_rsize,
2450 .op_func = nfsd4_clone,
2451 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2452 .op_name = "OP_CLONE",
2453 .op_rsize_bop = nfsd4_only_status_rsize,
2456 .op_func = nfsd4_copy,
2457 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2458 .op_name = "OP_COPY",
2459 .op_rsize_bop = nfsd4_copy_rsize,
2462 .op_func = nfsd4_seek,
2463 .op_name = "OP_SEEK",
2464 .op_rsize_bop = nfsd4_seek_rsize,
2469 * nfsd4_spo_must_allow - Determine if the compound op contains an
2470 * operation that is allowed to be sent with machine credentials
2472 * @rqstp: a pointer to the struct svc_rqst
2474 * Checks to see if the compound contains a spo_must_allow op
2475 * and confirms that it was sent with the proper machine creds.
2478 bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
2480 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2481 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
2482 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
2483 struct nfsd4_compound_state *cstate = &resp->cstate;
2484 struct nfs4_op_map *allow = &cstate->clp->cl_spo_must_allow;
2487 if (!cstate->minorversion)
2490 if (cstate->spo_must_allowed == true)
2493 opiter = resp->opcnt;
2494 while (opiter < argp->opcnt) {
2495 this = &argp->ops[opiter++];
2496 if (test_bit(this->opnum, allow->u.longs) &&
2497 cstate->clp->cl_mach_cred &&
2498 nfsd4_mach_creds_match(cstate->clp, rqstp)) {
2499 cstate->spo_must_allowed = true;
2503 cstate->spo_must_allowed = false;
2507 int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op)
2509 if (op->opnum == OP_ILLEGAL || op->status == nfserr_notsupp)
2510 return op_encode_hdr_size * sizeof(__be32);
2512 BUG_ON(OPDESC(op)->op_rsize_bop == NULL);
2513 return OPDESC(op)->op_rsize_bop(rqstp, op);
2516 void warn_on_nonidempotent_op(struct nfsd4_op *op)
2518 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) {
2519 pr_err("unable to encode reply to nonidempotent op %d (%s)\n",
2520 op->opnum, nfsd4_op_name(op->opnum));
2525 static const char *nfsd4_op_name(unsigned opnum)
2527 if (opnum < ARRAY_SIZE(nfsd4_ops))
2528 return nfsd4_ops[opnum].op_name;
2529 return "unknown_operation";
2532 #define nfsd4_voidres nfsd4_voidargs
2533 struct nfsd4_voidargs { int dummy; };
2535 static const struct svc_procedure nfsd_procedures4[2] = {
2537 .pc_func = nfsd4_proc_null,
2538 .pc_encode = nfs4svc_encode_voidres,
2539 .pc_argsize = sizeof(struct nfsd4_voidargs),
2540 .pc_ressize = sizeof(struct nfsd4_voidres),
2541 .pc_cachetype = RC_NOCACHE,
2544 [NFSPROC4_COMPOUND] = {
2545 .pc_func = nfsd4_proc_compound,
2546 .pc_decode = nfs4svc_decode_compoundargs,
2547 .pc_encode = nfs4svc_encode_compoundres,
2548 .pc_argsize = sizeof(struct nfsd4_compoundargs),
2549 .pc_ressize = sizeof(struct nfsd4_compoundres),
2550 .pc_release = nfsd4_release_compoundargs,
2551 .pc_cachetype = RC_NOCACHE,
2552 .pc_xdrressize = NFSD_BUFSIZE/4,
2556 static unsigned int nfsd_count3[ARRAY_SIZE(nfsd_procedures4)];
2557 const struct svc_version nfsd_version4 = {
2560 .vs_proc = nfsd_procedures4,
2561 .vs_count = nfsd_count3,
2562 .vs_dispatch = nfsd_dispatch,
2563 .vs_xdrsize = NFS4_SVC_XDRSIZE,
2564 .vs_rpcb_optnl = true,
2565 .vs_need_cong_ctrl = true,